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nife

Quickie - templated typedef?

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Hi, I just have a quick question, I couldn't really find the answer for (after I've tried and tried to solve it myself). I want to make a templated typedef if that's possible? It's because I've come to three possible solutions to my needs: 1. typedef boost::shared_ptr<Class> ClassPtr or class Class { typedef boost::shared_ptr<Ptr>; } 2. template<class T> SharedPtr : public boost::shared_ptr<T> { boost::shared_ptr wrapper implementation } 3. This is the one, I really want but cannot define properly. Something like SharedPtr<Class> (where SharedPtr is just a typedef) which I think could be made as so: typedef template<class T> SharedPtr<T> or template<class T> typedef SharedPtr<T> But since none of these are legal ways to typedef a templated class, I'm asking if I can do it the way I want, or do I have to use one of the other methods? EDIT: The reason for wanting to use a typedef in this case is that I am able to replace it with another implementation or my own later if needed.

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template<typename T>
struct MySmartPtr {
typedef boost::SharedPtr<T> type;
private:
MySmartPtr();
};

// use:
MySmartPtr<int>::type smart_int_ptr;

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#include <boost/shared_ptr.hpp>

namespace mylib
{
using boost::shared_ptr;
}

mylib::shared_ptr<int> ptr;

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Templated typedefs are not a current part of the C++ standard. They should make it into the next version (although the syntax looks a little stringstrange IMO).

[Edited by - SiCrane on June 26, 2006 10:18:24 AM]

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Okay, thanks for the answers guys. I guess I need to use an ugly hack to get my idea to compile after all...

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Quote:
Original post by nife
Okay, thanks for the answers guys. I guess I need to use an ugly hack to get my idea to compile after all...


Using a namespace is not a ugly hack. [razz]

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